docs: def _wait_for_machine_finish(self, name):
          """
          Interna method
          wait until machine is really destroyed, machine does not exist.
          :param name: str machine name
          :return: True or exception
          """
          # TODO: rewrite it using probes module in utils
          for foo in range(constants.DEFAULT_RETRYTIMEOUT):
              time.sleep(constants.DEFAULT_SLEEP)
              out = run_cmd(
                  ["machinectl", "--no-pager", "status", name],
                  ignore_status=True, return_output=True)
              if out != 0:
                  return True
          raise ConuException(
              "Unable to stop machine %s within %d" %
              (name, constants.DEFAULT_RETRYTIMEOUT))